A222994 Number of nX3 0..2 arrays with successive rows and columns fitting to straight lines with nondecreasing slope, with a single point array taken as having zero slope

27, 222, 3510, 35845, 440451, 4336850, 45780150, 429855929, 4210077753, 38391032908, 361489077216, 3243365023189, 29888768425389, 265889740878798, 2420966073903612, 21447101527922685, 193955683695342921

Offset

1,1

Comments

Column 3 of A222996

Links

R. H. Hardin, Table of n, a(n) for n = 1..31

Example

Some solutions for n=3
..2..1..2....2..1..1....0..1..0....1..1..0....1..1..0....1..1..0....2..0..0
..0..1..0....0..2..0....1..2..2....1..0..0....1..1..0....2..2..2....0..1..1
..0..0..1....1..1..1....0..2..1....1..2..2....0..1..2....0..2..2....0..1..2

Crossrefs

Sequence in context: A272342 A107054 A160441 * A125364 A126522 A273822

Adjacent sequences: A222991 A222992 A222993 * A222995 A222996 A222997

Keyword

nonn

Author

R. H. Hardin Mar 11 2013

Status

approved